We would need the possibility of using hotkeys for applying a Property Mapper Configuration to a diagram. Great for presentations.
This would -at least partially- would solve also some feature requests regarding layers.
By assigning a predefined mapping some objects can be made visible or unvisible (or highlighted) by simply pressing a key combination (like Ctrl-1...9, which are not used elsewhere).
I'm sure this would be a killer feature, and not too difficult to implement!
Thank you for this excellent tool, I use it almost daily.